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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 16-20 hours






2. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






3. Larger the cow - more milk is produced; smaller the cow - less milk is produced






4. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






5. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






6. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






7. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






8. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






9. Days which have decreasing daylight hours

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10. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






11. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






12. 1-3 days






13. Animals which have many estrous periods per year (ex: cow - sow)






14. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






15. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






16. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






17. 265-285 days






18. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






19. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






20. 10-37 (21) days






21. Failure to have one testis (gonad) to descend






22. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






23. Days which have decreasing daylight hours

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24. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






25. (male) pushes the testes upward toward the body for warmth or protection






26. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






27. Look for infection - split - and rupture of the penis






28. Larger the cow - more milk is produced; smaller the cow - less milk is produced






29. Allows extension of penis without fibro-elastic penis






30. What helps regulate spermatogenesis?






31. 283 days






32. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






33. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






34. Actual heat cycle (period)






35. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






36. When are steers and heifers weaned from bottle feeding?






37. FEED






38. 114 days






39. 1-3 days






40. Prevent the cow from getting an infection from the calve






41. 10-37 (21) days






42. ~305 days (altough often longer due to breeding difficulties)






43. Help to signal hormone levels which we need both in the brain right next to each other.






44. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.






45. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






46. What about the sperm for a bull which has been castrated but still has testicles?






47. What makes the milk flow through the mammary glands?






48. Why does estrus happen before ovulation?






49. Animals which have only one estrous cycle (ex: dog - fox)






50. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.







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